Maternal left ventricular diastolic and systolic long-axis function during normal pregnancy

Eur J Echocardiogr. 2007 Oct;8(5):360-8. doi: 10.1016/j.euje.2006.12.004. Epub 2007 Feb 23.

Abstract

Aims: The aim of this study was to evaluate left ventricular (LV) function during normal pregnancy and investigate the effect of maternal factors. Little information about LV diastolic and long-axis systolic function in normal pregnancy exists.

Methods and results: Two hundred and twenty eight Doppler echocardiography and DTI studies of the mitral annulus were performed in 63 normal pregnant women longitudinally at 11-14, 20-24, 26-32, 33-38weeks and 8-12weeks postpartum. Cardiac output, stroke volume and heart rate increased during pregnancy and total vascular resistance decreased. Long-axis shortening decreased, transmitral A velocity increased (p=0.003) and the ratio of transmitral E to A velocity decreased (p=0.001). DTI early diastolic velocity (E') decreased and late diastolic velocity (A') remained unaltered. DTI systolic velocity (S') and the E/E' ratio did not change significantly during pregnancy. Tei index increased throughout pregnancy (p=0.03). Maternal age was related to E velocity (p=0.001) and E/A ratio (p=0.001) while ethnicity was related to cardiac output (p<0.001), stroke volume (p<0.02) and heart rate (p<0.0001).

Conclusion: This study gives normal ranges for Doppler tissue imaging measurements, but demonstrates that maternal characteristics may affect these and all measures of systolic and diastolic function.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Cardiac Output / physiology
  • Diastole / physiology*
  • Echocardiography, Doppler*
  • Female
  • Gestational Age
  • Heart Rate / physiology
  • Humans
  • Longitudinal Studies
  • Models, Statistical
  • Pregnancy
  • Reference Values
  • Reproducibility of Results
  • Stroke Volume / physiology
  • Systole / physiology*
  • Vascular Resistance / physiology